Welded dipper stick construction



2 Sheets-Sheet In/vento@ f7. H055 n L -J'By M www@ ESL/E L. A. RUSSELL.

Filed Feb. 2l, 1951 WELDED DIPPER STICK CONSTRUCTION Jmwmumpp ,l l l l l I l l T l IIL l l l l l I l l I I l l I l l l l I l l l I l IY July 11, 1933.

July 11, 1933 L. A. RUSSELL WELDED DIFFER STICK CONSTRUCTION 2 Sheets-Sheet Filed Feb. 2l, 1951 lil Patented July l1, 1933 UNITED STATES rarer FFC LESLIE A. RUSSELL, OF MILWAUKEE, VIISCONSIN, ASSIGNGR TQ KOEHRNG COPNY, OF MILVJAUKEE, YV'ISCGNSN, A CGROLTGH WELDED DIFFER STCK ONSERUCTON Application filed February 2 In power shovels and similar machines, it usual to 'fabricate the clipper stick upon which the shovel is mounted of two identical members oi unitary construction, and it is .tound that in operation, such clipper sticks are open to the objection of .frequent breaking under the great twisting strains and wear to which thes sticks are subjected when in operation.

The present invention relates to a novel. form ot such dipper sticks, wherein there are obtained increased rigidity, increased lightness in weight and increased durability, so that the sticks are capable to endure the sl'iocks and strains incident to the actual operation of these sticks.

it has been proposed previously to this invention to employ clipper sticks embodying the use ot angles and plates butt-welded tothe welds must gether, the Wel-.ds being along the corners of the clipper stick units, in which constructions themselves withstand the twisting stresses encountered, which requently cause the welds to crack and to ing pairs the welding, and

' neutral axis, it is submitted to less amounts break open.

In this present construction there is provided a clipper stick comprising two duplicate side members each member formed ot oppose l of channels welded together along adjoining edges so that this weld will be along the neutral axis of the dipper stick. This results in avoidance of bumping or twisting ot the sticks by any internal stresses set up by the weld being along the oi external stress, the rigid steel corners taking the load. Each ot' the si le members, therefore, is of hollow construction,lmt by the provision ot suitable reinforcing means,

either internally or externally of the hollow space enclosed by the opposing channels, the required rigidity of the dipper stic t is effected.

The invention will be readily understood from the accompanying drawings, in which:

Figure 1 is a` plan View ot a clipper stick constructed in accordance with this invent-ion.

Figure 2 is a side elevation thereof.

Figure 3 is a section along the line 3-3 ot Figure 2.

i, 193i. Serial No.

Figure Ll is a section along the line 4-4 of Figure 2.

Figure 5 a view oit a somewhat different 'torni ot dipper stick from that illustrated in Figure l, the igurc being a plan.

lligrrc (i is a sioe elevation ot the clipper stick oit Figure Figure 7 is ,ectional view along the line l1-i ot Figure (l.

The members ll and l2 carry the clipper 'Y' stick :toot casting 13.

rllhe members ll and l2 are made up ot' a pair oit angle members 14 and l5, joined together along their corresponding edges. These corresponding edges are beveled as shown at i6 and l?, so that the joints between them are outwardly tapering. The angles let and lt are welded along these joints as indicated at '178 and l), the weld substantially lilling the joints, and because of its contigui-ation, it produces a union o'i progressively increasing strength.

'.lhe clipper stick loot casting 1S is bolted to each side member l2 by bolts, not shown, extending through the bolt holes 20, and there is also provided a plurality of holes 2l, Q2 and extending through the channel meinbers le and l5, there being positioned interiorly ot the channel meu'ibers in engagement with these holes, the plates 2li, 25 and 2G, which serve as reinforcing plates, and which are welded to the channel members ls. and l5 through the holes 2l, QQ and 253 respectively.

As illustrated tor iulditional reinforcement. the plate 25 is shown as extending substantially longer than the upper and lower plates 241 and 26, although this is only a dctail of construction.

As will be seen jirom the drawings (Figure 3) the members 24;, 25, and 2G are welded by angle welds to the continuous inner surface of the channel 14, the said members being welded to the channel 15 through the openings or perforations 21, 22, and 23.

To the underside of the channel members 14 and 15 is welded the rack 27, the welds bcing indicated at 28.

It may be here pointed out that the nature of the welds attaching the reinforcing plates 24, 25 and 26 is that of rivet welds, although in Figure 3, it will be seen that the weld extends around the angles between the plates as indicated in blaeli on Figure The member 12 is provided with a cap at its end 28, which extends over the end ot the rack 27 to serve as a stop tor the rack during racking operations.

Angle plate 29 is provided to give a tight fit between the cap 28 and the channel members 14 and 15.

In the construction illustrated, in Figures 5 to i) inclusive, the channel members 14m and 15a making up either ot the side members 11a or 12o ot the dipper stick 10a, are welded as before described along their adjoining edges as indicated at 17a and 18a, these welds having the outwardly tapering configuration previously described, and being along the neun tral axis of the dipper stick. The channel members 14o and 15a are pierced by the aligned holes indicated at 21a and 22o, which ho-les are for the purpose hereinafter dcscribed.

It Will be seen from the drawings that spaced along the length ol. the channels lll-fr. and 15a are the reinforcing` plates S0 which extend transversely across the space enclosed by the channel members 14a and' 15a, these plates being of si'lhstantially the configuraH tion of the hollow space between the channel members, substantially filling the cross-sectional. area. of this space. The plates 30 arel Welded in position by rivet welds extending through the holes 21o and 22o, these rivet welds being indicated at 31. Thus, these plates are rigidly secured in position.

To serve as further reinforcement of the channelv members, there maybe provided upper and lower plates 32 and respectively, these plates being welded at their edges to the channel members as shown at 3ft. and may also be further secured in position by means 0f bolts or rivets extending completely through the plates 32 and 33 and the channel members, thus securing very rigidly together the various parts of the assembly. l

Welded to the plate 33 is the rack 36, the welds being indicated at 37.

It Will be apparent from consideration of this description that there is thus provided a very rigid construction, none o the welded parts of which submitted to the strains and shocks incident to the operation of the device. It will be apparent that many changes in the details of the construction may be made without departing trom the inventive concept, and it will be understood that it is intended and desired to embrace within the scope of this invention, such modilicatiom.: and changes as may be required to adapt it to varying conditions and uses.

Having thus described my invention, what 1 claim as new and desire to secure by Letters Patent of the United States, is we l. A dipper stick comprising a pair ot side members, each ol which lormed of a pair oit opposing channel members placed togetl'ier and welded along their adjoining edges, at least one oil. the said channel members having spaced apart series ot aligned openings therethrough, and a plurality ol reinforcing plates within the channel members, the said plates haring edge sinf'aces engaging the inner faces ol the channel members and registering with the said olienings, and being secured .in position hy angle welds at thc inner sui-tace o'l'Y one ot the channel members and by rivet welds through said openings in the other channel member.

2. A dipper stick comprising a pair of side members cach ot which is formed oiE a pair ol opposing' channel members welded together along their neutral axis, upper and lower reiniiorcing plates between the channel members and rivet-welded thereto, the reinforcing plates extending longitudinally of the channel members, and a reinforcing plate intermediate the upper and lower plates and also rivet-welded to the channel members, the 1 intermediate plate being substantially longer than the top and bottom plates.

3. A clipper stiel: comynfising a pair of side membersl each ot which is formed o'l a pair et opposing channel members welded together along adjoining edges, upper and lower reintorcingg,` members extending longitudinally externally alongthe channel members and welded thereto, a rack member welded to the lower rcin'torcing ineniber, and spaced reinforcing members extending transversely interiorly oi the channel n'iembers and rivet welded thereto, each ot the transverse reiniorcing members having a contigui-ation co1'- responding to the cross sectionalfshape of the space enclosed by the channel members.

In testimony whereof I aiiix my signature.

LESLIE A. RUSSELL. 

